Space science is the study of outer space and all the stuff that is in it. People who study space science use different kinds of telescopes and special satellites to look at the planets, the stars, and the galaxies that are in the sky. Scientists use these tools to learn more about how space works and how it affects our lives on Earth. They also look for signs of life in outer space and for planets that could support life. Studying space also helps us understand more about our planet, what kind of environment we have here on Earth, and how it might change over time.